<form class="form-inline col-lg-offset-6" role="form" id="frm_cetak" action="controller/cont.cetak.php" method="post">
  <input type="text" id="cetak_surat_doc2" name="cetak_surat_doc2" />
   <div class="form-group">
  <button type="submit" class="btn btn-success" id="proses_doc_btn">Print Docx</button>
  </div>
</form>